The casting number is found on top
of the head between the rocker arm studs.

Casting
number

Year

Engine

HP

Valve
Int/Exh

Chamber
(cc)

Casting
symbol

3890462

1967
early

327

275

1.94/1.50

63.305

350

295

302

290

2.02/1.60

3917215

1967
late

396

325

2.06/1.72

100.967

N/A

1968

325,350

3917291

1967
late

327

275

1.94/1.50

63.305

350

295

1968

327

275

350

295

3917291

1967
1968

302

290

2.02/1.60

63.995

3917293

1968

327

210

1.72/1.50

75.340

3919840

1967
late

396

375

2.19/1.72

106.8

1968

1969

427

425

3919842

1968

396

375
L89

2.19/1.72

106.8

1969

3927185

1969

307

200

1.72/1.50

69.625

327

210

3927186

1969

350

300

1.94/1.50

63.305

360

2.02/1.60

302

290

3931063

1969

396

325
350

2.06/1.72

100.967

3932441

1969

350

250
255

1.94/1.50

76.26

3946074

1969

427

430
(ZL1)

2.19/1.88

118.00

3947041

1969

350

300

1.94/1.50

63.305

302

290

2.02/1.60

3964290

1969

396

325
350

2.06/1.72

100.967

3964291

1969

396

375

2.19/1.88

109.037

427

425

These are heads that would have
been used in Camaros as either standard or replacement during the period. There were other
heads used in Chevrolet engines which may have ended up on your motor if it's not
original. If you do have a head with a number not listed here, you can find it in
"Chevrolet By The Numbers" by Alan Colvin. Find out where to get it on the books
page.